A US diplomat was wounded and his Sudanese driver killed in a shooting incident in the capital of Sudan, Khartoum, reports say.
Anti-US sentiment in Sudan is quite widespread
The Sudanese driver was killed on the spot and the US official critically injured as they were heading home.
The attack happened during the early hours on Tuesday in a main street of the capital.
It is not yet clear whether the attack was politically motivated, as crime is fairly high in the city.
"Early this morning an American officer with the US Agency for International Development was shot and wounded," Walter Braunohler, public affairs officer at the US Embassy in Khartoum, told Associated Press.
"A locally-employed Sudanese national was killed in the same incident."
Sudan's director of police, Mohammed Najib, issued a statement saying the US diplomat was injured in the neck and chest, and had been taken to hospital.
Sudan's police said they have launched a large-scale operation to try to hunt down the perpetrators.
The shooting happened the day after a joint African Union-United Nations force took over peacekeeping duties in Sudan's war-torn Darfur region.
Anti-Western and anti-US feelings are running high in Sudan, because of Western criticism of Khartoum's policies in Darfur, observers say.